Pages

Wednesday, February 29, 2012

Honey Bee Drifting

End of the line effect

The concept of drifting is that with a number of hives in a row, on a windy day the bees are more apt to return to the first hive from the direction of the main pollen flow. Consequently the first hive will be much stronger than the last hive. Dave Cushman suggests the opposite "end of the line" effect (Dave Cushman on Drifting Behavior in Honey Bees). Dave goes on to describe the drifting effects of featureless water.

In any case the disoriented, drifting bees will have an unfamiliar smell to the guard bees but will usually be allowed entrance if carrying pollen and displaying submissive behavior. Ted Hooper in his book "Guide to Bees and Honey" states:

“a drifting bee entering the colony by mistake, perhaps because it has been blown down to the hive by a cross wind, or misled by a similarity of the approach picture, will be challenged. In this case the guard will press the challenge because the smell of this bee is not the right one. The drifter, because its instinct says it is in the right place, will not try to fight the guard but will submit. If the drifter is facing the guard it will offer food, which the guard will usually ignore. If the guard is attacking from the side [...] the drifter will tuck its tail in and stand quiet, with its head tucked down, or it may rear on to its two back pairs of legs, extending its tongue and strop this with its front legs. These patterns of behavior denote submission and the guard [...] will do no real harm and certainly not attempt to sting. As with all bees, the guard’s concentration period is short, and in a few seconds it gets tired of the whole affair and lets the drifter proceed”

The study below suggests that the optimal distance is 9 meters between hives and 18 meters between rows but this is often not possible. They list ways to reduce drifting by different apiary layout (circles, squares, U, V, Sigmoid), different entrance orientation and different colors. The idea is that different colored hives will assist the bees in identifying their own hive.

The idea is that different colored hives will assist the bees in identifying their own hive. Bees see colors
differently than we do and studies show they prefer purple, violet and blue in
that order. Bees can see ultraviolet light patterns invisible to us (Honey Bees ability to identify color).

It's like if you are drunk and walking back to your house and all the homes are of the exact color and architectural style. This is human drifting. I have personally experienced this phenomena. This can be very embarrassing.

Translate

Free Course

Ohio State University has created a free honey bee biology and beekeeping course based on Dr. Reed Johnson's for-credit OSU Beekeeping Course. The free course consists of video lectures, handouts and readings presented on iTunes which is a free download. The course is extensive and consists of 138 segments covering every aspect of bees and beekeeping. To access this course click on the image above.

Strathcona Beekeepers

The Strathcona Beekeepers meet on the last Sunday of each month during the bee season. Everyone is welcome. For more information on the meetings or our community Beekeeping Coop contact us at strathconabeeatgmaidotcom.